Where did I get the plant from:
I have received the plant in 2000 from the late P. C. O. N?rgaard, Sundby Mors, Denmark, whom got it from, from Zagrep Botanical Garden. P.C.O. N?rgaard did grow the plant under the name Yucca karlsruhensis type 2!

Short description:
Plant acaulescent with one or several rosettes, forming new rosettes from short rhizomes. Leaves: dark green with a bluish bloom, up to 45 cm long, 14 to 18 mm wide around the middle, many fibers at the margin of the leaves. Inflorescence: pubescent, paniculate, 100 cm high, with a few short branches up to 10 to 13 cm long, the branches are held in an upright angle. Scape:  up to 45 cm cm held above the leaves.
Flowers: campanulate (bell shaped). Fruit the young fruit is purple and very pubescent, 25 mm thick and 40 mm long. Seeds: not known at the time of writing. Flowering time: (in Denmark) late July to mid August.

Where do I grow the plant:
In a raised well drained bed.

Hardiness:
So far it has been very hardy, it does not show any damage after the winters. It has been in cultivation in northern Europe for decades, I do not know for how many years it has been grown in Denmark.

Notes:
This plant is one of the most sought after Yucca hybrids in Europe. Succulent Tissue Culture in The Netherlands, has tried to propagate it, but they unfortunately failed, I will send new material when possible for a new trial.

Other notes:
In August 2004 I did cross pollinate the plant with pollen from other Yuccas:

# 1454 Yucca 'Karlsruhensis' X Yucca elata (from Inger ? Mogens Madsen), 4 flowers pollinated, = 2 fruits (2 aborted).
# 1454 Yucca 'Karlsruhensis' X Yucca 'Vittorio Emanuele II' (from Inger ? Mogens Madsen), 2 flowers pollinated, = 0 fruits (2 aborted).
# 1454 Yucca 'Karlsruhensis' X #500 Yucca sp. Hybrid?, 4 flowers pollinated = 1 fruits (3 aborted).
# 1454 Yucca 'Karlsruhensis' X Yucca sp. gloriosa ? (BMJ #755) (from Tobias Rasmussen), 1 flower pollinated = 0 fruit (1 aborted).

It will be very interesting to see the outcome of the new hybrids, but I do not expect flowers in the new hybrid until 2010 at the earliest!

I now grow the following of the above in the garden or in pots:

1999 Yucca "Jensen hybrid" (Yucca 'Karlsruhensis type 2' x Yucca hybrid #500), s2007, (BMJ # 1454 x 500)
2000 Yucca "Jensen hybrid" (Yucca 'Karlsruhensis type 2' x Yucca elata), s2007, (BMJ # 1454 x pollen from Mogens Madsen)
2001 Yucca "Jensen hybrid" (Yucca 'Karlsruhensis type 2' x Yucca elata), s2007, (BMJ # 1454 x pollen from Mogens Madsen)

More details of the Yucca hybrids made in 2003 and 2004.

Again in 2008, were I able to use this plant for new hybrids:

2078 Yucca "Jensen hybrid" 'Karlsruhensis type 2' x sp. [gloriosa forma robusta] "H?strupvej", s2009, BMJ  (1454 x 2076)
2079 Yucca "Jensen hybrid" 'Karlsruhensis type 2' x "Jensen Hybrid" # 1823, s2009, BMJ (1454 x 1823 (Pollen from Steen Stjerne))
2080 Yucca "Jensen hybrid" 'Karlsruhensis type 2' x angustissima ssp. kanabensis, s2009, BMJ (1454 x 337C)
2081 Yucca "Jensen hybrid" 'Karlsruhensis type 2' x angustissima ssp. kanabensis, s2009, BMJ (1454 x 337C)
2082 Yucca "Jensen hybrid" 'Karlsruhensistype 2' x angustissima ssp. kanabensis, s2009, BMJ  (1454 x 337C)
2083 Yucca "Jensen hybrid" 'Karlsruhensis type 2' x rostrata, s2009, BMJ (1454 x (Pollen from Ruud Wouterson))
2084 Yucca "Jensen hybrid" 'Karlsruhensis type 2' x rostrata, s2009, BMJ (1454 x (Pollen from Ruud Wouterson))
2085 Yucca "Jensen hybrid" 'Karlsruhensis type 2' x rostrata forma viridis, s2009, BMJ (1454 x  (pollen from Sascha Weissbeck))
2153 Yucca "Jensen hybrid" hybrid #1402 [big "blue" form of Y. filamentosa ?] x 'Karlsruhensis type 2', s2009, BMJ (1402 x 1454)
2145 Yucca "Jensen hybrid" sp. [gloriosa forma robusta] "H?strupvej" x 'Karlsruhensis type 2', s2009, BMJ (2076 x 1454)
2146 Yucca "Jensen hybrid" sp. [gloriosa forma robusta] "H?strupvej" x 'Karlsruhensis type 2', s2009, BMJ (2076 x 1454)
2147 Yucca "Jensen hybrid" sp. [gloriosa forma robusta] "H?strupvej" x 'Karlsruhensis type 2', s2009, BMJ (2076 x 1454)
2148 Yucca "Jensen hybrid" sp. [gloriosa forma robusta] "H?strupvej" x 'Karlsruhensis type 2', s2009, BMJ (2076 x 1454)
2149 Yucca "Jensen hybrid" sp. [gloriosa forma robusta] "H?strupvej" x 'Karlsruhensis type 2', s2009, BMJ (2076 x 1454)
2232 Yucca "Jensen hybrid" 'Elegantissima' x 'Karlsruhensis type 2', s2009 BMJ (1581 x 1454)

More information about the" 2008 Jensen hybrids".

In 2009 I were able to use this plant for new hybrids:
 

In bloom in August 2000, in the garden of the late nursery owner P.C.O. N?rgaard (1917-2003). Photo by Benny M. Jensen Copyright © 2000	The fruit of #1454 Yucca 'Karlsruhensis Type 2' Photo by Benny M. Jensen Copyright © 2004	The fruit of #1454 Yucca 'Karlsruhensis Type 2' Photo by Benny M. Jensen Copyright © 2004	The flower bud of #1454 Yucca 'Karlsruhensis Type 2', June 16th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009
The flower bud of #1454 Yucca 'Karlsruhensis Type 2', June 16th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009	In bloom, July 10th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009	In bloom, July 10th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009	Leaves, July 10th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009
In bloom, July 14th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009	The flower, July 14th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009	The flower, July 14th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009	The flower, July 14th. 2009. Photo by Elena Y. G. Jensen Copyright © 2009

Photos of hybrids with this plant:
 
 

2374 Yucca 'Karlsruhensis type 2' x rupicola. Jensen hybrid from 2009. Sown 23.03.2010 flowerday, Transplanted 26.05.2010 flowerday.  Photo from August 27th. 2010	2380 Yucca 'Karlsruhensis type 2' x (reverschonii x thompsoniana) Jensen hybrid from 2009. Sown 23.03.2010 flowerday, Transplanted 26.05.2010 flowerday.  Photo from August 27th. 2010	2384 Yucca 'Karlsruhensis type 2' x rupicola Jensen hybrid from 2009. Sown 23.03.2010 flowerday, Transplanted 26.05.2010 flowerday.  Photo from August 27th. 2010